Because in their hands it could virtually western shipping out of Chinese offshore waters.
Or the remnants of something else piled into the offshore waters?
The offshore water is one of the few places in the world where manta rays are common close to shore.
Individuals are occasionally taken in offshore waters to 40 m during winter.
The two known species are found off Australia, inhabiting deep, offshore waters on or near the bottom.
In deeper offshore waters where waves can have five times as much power, some experts say, the yield could be far greater.
This is attributed to the differences in friction between land masses and offshore waters.
In London, legislation is being worked on that would open up the offshore waters to drilling.
The offshore waters are deep enough for some excellent viewing of coral and tropical fish.
Debris from past human occupation is scattered throughout the island and in offshore waters.